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Brewers closer Jim Henderson took over for John Axford in early April and has posted a 0.92 ERA while converting all nine of his save opportunities. (Mike McGinnis/Getty Images)

Milwaukee Brewers closer Jim Henderson will be out "a while," according to manager Ron Roenicke, after pulling his hamstring during Friday's 2-1 win over the Pirates.

The 30-year-old right-hander suffered the injury while delivering a pitch in the ninth inning of the game.

Veteran reliever Francisco Rodriguez picked up the save the next inning, and could be a candidate to replace Henderson. The Brewers signed Rodriguez to a minor-league deal in mid-April and called him up on May 15.

Henderson has thrived during his first season as closer -- after replacing the struggling John Axford in early April -- and second season in the majors after 10 years in the minor leagues.

His scoreless outing on Friday lowered his ERA to 0.92, with 23 strikeouts in 19.2 innings and nine saves in as many opportunities.

Henderson was limping on Saturday and is scheduled to be examined by a doctor, Roenicke told the Associated Press. The manager added that the injury could be serious enough to force the team to make a roster move.